---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-069164"
form_type: "8-K"
ticker: "PAGP"
cik: "0001581990"
company_name: "PLAINS GP HOLDINGS LP"
filed_at: "2026-06-02T10:05:30+00:00"
generated_at: "2026-06-02T10:11:24.406469+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Plains GP Holdings announces CAO succession: Montgomery promoted, Herbold retiring

## Summary
- Russ Montgomery promoted to VP, Accounting and CAO, effective September 1, 2026.
- Chris Herbold retiring as SVP, Finance and CAO on August 31, 2026.
- Montgomery, age 50, served as VP, Controller since 2019; previously Controller and other roles at PAA.

## SEC filing metadata
- accession: 0001104659-26-069164
- form_type: 8-K
- ticker: PAGP
- cik: 0001581990
- company_name: PLAINS GP HOLDINGS LP
- filed_at: 2026-06-02T10:05:30+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1581990/000110465926069164/0001104659-26-069164-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1581990/000110465926069164/tm2614304d4_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-069164
- JSON: https://secwatch.observer/filing/0001104659-26-069164.json
- Plain text: https://secwatch.observer/filing/0001104659-26-069164.txt

## Source-grounded claims
- claim_id: 74c64afb2a
  claim: Russ Montgomery was appointed as Vice President, Accounting and Chief Accounting Officer at PLAINS GP HOLDINGS LP.
  evidence_excerpt: effective September 1, 2026, Russ Montgomery will be promoted to the position of Vice President, Accounting and Chief Accounting Officer of Plains All American GP LLC, the general partner of PAA, and PAA GP Holdings LLC, the general partner of PAGP.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1581990/000110465926069164/0001104659-26-069164-index.htm
- claim_id: 7db74abbf2
  claim: Chris Herbold departed as Senior Vice President, Finance and Chief Accounting Officer at PLAINS GP HOLDINGS LP.
  evidence_excerpt: Chris Herbold, who previously served as Senior Vice President, Finance and Chief Accounting Officer of PAA and PAGP, is retiring from the company on August 31, 2026.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1581990/000110465926069164/0001104659-26-069164-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.